Home / 55,638.12-76,778.10-30,487.08

Finding the Fourth Proportional to 55,638.12, 76,778.10 and 30,487.08

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Solution

The fourth proportional to 55,638.12, 76,778.10 and 30,487.08 is: 42,070.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,638.12 : 76,778.10 = 30,487.08 : x
  2. Step 2: Convert to fraction form
    55,638.12/76,778.10 = 30,487.08/x
  3. Step 3: Cross multiply
    55,638.12x = 76,778.10 × 30,487.08
  4. Step 4: Simplify right side
    55,638.12x = 2,340,740,076.95
  5. Step 5: Solve for x
    x = 2,340,740,076.95/55,638.12
  6. Step 6: Final answer
    x = 42,070.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.